In the final instalment of this series about the Treaty of Waitangi, Mike King follows the Herald Bunbury treaty sheet. It was the only sheet to reach the bottom of the South Island, and one of nine that made it’s way around Aotearoa. King learns that while Thomas Bunbury, a well-educated Napoleonic war hero, endeavoured to gather signatures and claim sovereignty over Te Waipounamu, the island's chiefs were few and hard to find. Descendants of the chiefs share stories about their ancestors' entrepreneurship and foresight — and how they ended up selling the entire South Island to Australia for 100 pounds.